Joining metal plates



(No Model.)

J. SCHAEDLER Joining Metal Plate.

Patnted Sept. 7,1880.

WITNESSES: [I INVENTOR ATTORNEY P EIERS. FHOYO Lm-locm WASHlNGTON D C To all whom it may concern- UNrrEn STATES PATENT OFFICE.

JACOB SCHAEDLER, OF BRIDGEPORT, CONNECTICUT.

JOINING METAL PLATES.

SPECIFICATION forming part of Letters Patent No. 232,074, dated September '7, 1880.

Application filed May 13, 1880. (N0 model.)

. Be it known that I, JACOB SGHAEDLER, of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Joining Metal Plates, of which the following is a specification.

The object of this invention is to furnish improved means for joining metal plates of cast-zinc, cast-iron, 8m, employed for monuments, architectural work, 820., so that a reliable and permanent connection of the plates is obtained without any danger of separation at the joints.

Hitherto the metal plates of architectural ornaments, 850., were jointed first by soldering their meeting edges with tin, then casting into the vertex of the angle molten zinc, which formed a kind of prismatic connection at the inside of the plates. The molten zinc, however, has the disadvantage of dissolving the tin-solder, and of preventing thereby the intimate adhesion of the zinc to the sides of the plates, so that when the so-jointed plates were exposed to the atmospheric influence for some time the joints began to open and the plates lost their hold.

My invention is designed to prevent this disadvantage; and it'consists in providing the metallic plates at their insides, near the meeting edges, with projecting cleats of dovetail shape or rectangular cross-section and castin g the zinc around the cleats and into the space formed between the same and the vortex of the angle of the plates.

In the accompanying drawings, Figure 1 represents a perspective view of a cast-metal monument made according to my improved method. Fi 2 is an inside perspective view, showing the angle of two plates, and Fig. 3 is a vertical transverse section of two adjoining plates and the means by which they are connected.

' Similar letters of reference indicate corresponding parts.

A and B in the drawings represent two adjoining metal plates, which are jointed at any desired angle, their meeting edges being connected by tinsolder. Each plate is cast or otherwise provided at the inside, and a short distance from the meeting edge, with a projecting rib or cleat, (1, either of dovetail shape or rectangular cross-section, in which latter case the ribs or cleats are notched to permit the intimate interlocking of the cast-zinc therewith.

The interior angle of the plates is filled with molten zinc C, which surrounds entirely the projecting cleats and fills up the space between the same and the angle of the plates.

The zinc forms a kind of wedge-connection of the plates around the cleats, and prevents any possibility of their parting, so that monuments, architectural ornaments, and other structures which are jointed in this manner are not liable-to suffer by atmospheric influ ences at their joints, and will last as long as the entire structure itself without any possibility of parting at the joints.

Having thus described my invention, I claim as new and desire to secure by Letters Patent As an improvement in joining metal plates for ornamental purposes, the combination of adjoining plates having interior projecting cleats near their meeting edges with a body of metal which is cast around and into the space between the cleats, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 8th day of May, 1880.

JACOB SCHAEDLER.

Witnesses HERMAN GAUss, RUDOLPH KOST. 

